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The sub-zones were delineated using the River Environment Classification (NIWA) and the Utility Network Analyst tool in ArcGIS.Forty-four water management zones and 124 sub-zones have been defined across the Manawatu-Wanganui Region.Using water management zones and sub-zones was the first step towards policy development for integrated catchment management of natural resources in the Manawatu-Wanganui Region.", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 2193, "latestWkid": 2193, "xyTolerance": 0.001, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -4020900, "falseY": 1900, "xyUnits": 10000, "falseZ": 0, "zUnits": 1, "falseM": 0, "mUnits": 1 }, "copyrightText": "Horizons Regional Council. Acknowledgement of Horizons IP (for development). 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